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RESUMEN | Se detectaron presuntas hipnosporas de Perkinsus sp. en una población silvestre de la almeja Megapitaria squalida (enero-diciembre 2013) al norte del estado de Sinaloa, México, con la técnica de tinción de tioglicolato (MFTR). Se colectaron 30 almejas cada mes (64.08 ± 4.75 mm altura de la concha y 68.76 ± 14.34 g de peso). Se obtuvieron los parámetros fisicoquímicos del agua (temperatura, salinidad, pH, oxígeno disuelto, profundidad y transparencia). La prueba MFTR detectó células esféricas de color obscuro, indicando la presencia de presuntas hipnosporas de Perkinsus sp. todos los meses de muestreo menos en diciembre. La intensidad de la infección promedio fluctuó de negativa a ligera, mientras que la prevalencia máxima fue de 70% observada en mayo. La carga parasitaria mostró correlación con los indicadores métricos de la almeja. No se obtuvo correlación (p > 0.05) entre la prevalencia del patógeno con todos los parámetros estudiados. Los resultados sugieren que M. squalida es poco susceptible a la infección de Perkinsus sp. ABSTRACT | Presumptive Perkinsus sp. hypnospores were detected in a wild population of the callista clam Megapitaria squalida (January-December 2013) from the north of the state of Sinaloa, Mexico, using the thioglicollate staining technique (MFTR). 30 clams were collected each month (64.08 ± 4.75 mm shell height and 68.76 ± 14.34 g weight). The physicochemical parameters of the water (temperature, salinity, pH, dissolved oxygen, depth, and transparency) were obtained. The MFTR test detected spherical cells of dark color every sampling month, except in December, indicating the presence of presumptive Perkinsus sp. hypnospores. The intensity of infection fluctuated from negative to light, while the maximum prevalence was 70% observed in May. The parasitic load showed correlation with the metric indicators of the clam. No correlation (p > 0.05) was obtained between the prevalence of the pathogen with all the parameters studied. The results suggest that M. squalida is little susceptible to the infection of Perkinsus sp.
https://revistas.utm.edu.ec/index.php/aquatechnica/article/view/2152
Sinaloa, Almeja, Prevalence, Infección, Parasitología, Parasitology, Prevalencia, Clam, Infection
Sinaloa, Almeja, Prevalence, Infección, Parasitología, Parasitology, Prevalencia, Clam, Infection
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